Object can't be converted to a string in MySQLi PHP

Question

Catchable fatal error: Object of class mysqli_result could not be converted to string in C:\\xampp\\htdocs\\xxx\\dash.php on line 20

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Answer 1

if ($result = $mysqli->query($query)) {
    while($row = $result->fetch_object()) {
            echo row['column_name'];
        }
}
$result->close();

where you see 'column_name put the name of the column you want to get the string from.

Answer 2

You have to fetch it first before echoing the results. Rough Example:

function GetVar($var, $username, $mysqli) {
    // make the query
    $query = $mysqli->query("SELECT ".$var." FROM users WHERE username = '".$username."' LIMIT 1");
    $result = $query->fetch_assoc(); // fetch it first
    return $result[$var];
}

Then use your function:

echo $user->GetVar('rank', 'Liam', $mysqli);

Important Note: Since you're starting out, kindly check about prepared statements. Don't directly append user input on your query.

Answer 3

Read this tutorial. it explain how to read and display data from a dataabse

Select Data From a Database Table